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Acc Power Source Circuit

  1. Remove A/C-heater control assembly, leaving harness connectors connected. See A/C-HEATER CONTROL ASSEMBLY  under REMOVAL & INSTALLATION. Turn ignition on. Backprobe between terminal A21-12 (Gray wire) of A/C-heater control assembly connector and ground. See Figure.
  2. If battery voltage exists, no problem is indicated at this time. If battery voltage does not exist, inspect RADIO No. 2 fuse (15-amp), located in instrument panel fuse block. If fuse is okay, inspect wiring between A/C-heater control assembly and battery. Repair as necessary. Replace fuse if blown, and check for a short circuit. Repair as necessary.
  3. Turn ignition off. Check continuity between terminal A21-22 (White/Black wire) and ground. Repair open White/Black wire if continuity does not exist.
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